Regulating system



A. H. CANDEE.

REGULATING SYSTEM.

APPLICATION FILED AUG-26. 1918.

1,421,165. PatentedJune 27, 1922.

WITNESSES? INVENTOR UNITED STATES PATENT OFFICE.

ANDREW H. OANDEE, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVANIA.

REGULATING SYSTEM.

Specification of Letters Patent.

Patented June 27, 1922.

Application filed August 26, 1918. Serial No. 251,421.

To all 1.0 710m it may concern.

Be it known that I, ANDREW I-I. CANDEE, a citizen 01' the United States, and a resident 01? Pittsburgh, in the county oi Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Regulating Systems, of which the following is a specification.

My invention relates to regulator systems and particularly to systems for maintaining a constant current flow through supply circuits. 1

One object of my invention is to provide a. regulator system that shall maintain a substantially constant potential'across, and, accordingly, a constant flow through, a plurality of translating devices.

Another object of iny'invention is to provide a plurality of translating devices, which are connected across a supply circuit, with means connected in circuit with them for varying the impedance of the circuit of the translating devices directly in accordance with the voltage of the supply circuit, whereby a constant current flow is maintained through the translating devices.

More specifically, invent-ion embodies a. plurality of incandescent lamps connected, in series with a motor, across a supply circuit, a metallic disk which revolves in a magnetic field and which is directly connected to the motor, and means for varying the strength of the magnetic field indirectly in accordance with the voltage of the supply circuit, whereby the counter-electromotive "force of the motor is varied in a manner to maintain a, constant current'flow through the translating devices.

In many cincuits, as, for example, the trolley circuits of electric railways, the voltage is constantly varying by reason of the variation of the load connected to them. Consequently, some means must be provided in the circuit of the incandescent lamps,

which are connected across similar circuits,

for maintaining a constant current flow through the lamps. In a system constructed in accordance with my invention, a constant current flow is maintained through the lamps in a simple and economical manner.

In the accompanying drawings, Fig. 1 is a diagrammatic view of a system of control constructed in accordance with my invention and Fig. 2 is a detail view of a magnetle device utilized in my invention.

Referring to the drawing, a plurality of lamps 1 are connected, in series with a motor 2, across a supply circuit comprising a trolley conductor 3 and a ground-return conductor 4. The motor 2 embodies a series field winding 5 and an armature 6.

A rotatable disk 7, which is composed of copper or some similar material, is directly connected to the armature 6 of the motor 2 in any suitable'manner, as by means of a shaft 8, in order to be rotated by the motor 2. A magnetic device 9 is provided for maintaining a magnetic field, which varies in accordance with the supply-circuit voltage and establishes a flux through the'disk, substantially inversely in accordance with the supply-circuit voltage. The magnetic device 9 embodies a coil 10, which is connected across the supply conductors 3 and 4, two armatures 11 and 12, which are pivotally mounted upon the pins 13 and are adapted to be given a movement of rotation in one direction by means of the magnetic coil 10 and to be retracted in an opposite direction by means of a spring 1 1. The two armatures 11 and 12 are provided with end portions 15 and 16 which are disposed on opposite sides of the rotating disk 7 and are adapted to engage the stops 17 and 18 when in a retracted position. The armatures 11 and 12 are also provided with end portions 19 and 90 between which an air gap 21 is m aintained.

Assuming the motor 2 and the lamps 1 to be connected across the supply circuit 3 1, it is evident that the coil 10 of the magnetic device 9 will maintain a magnetic field across the end pieces 15 and 16 of the armatures 11 and 12 for producing a braking effect upon the motor 2 by means of the rotation of the disk 7 in the magnetic field. If the voltage of the supply circuit should be increased, the strength of the magnetic coil 10 would Hoe increased to attract the armatures 11 and 12, and thus to decrease the air gap 21 and increase the air gap between the end portions 15 and 16. Accordingly, the reluctance of the magnetic circuit in which the disk 7 is rotating is increased and the braking effect upon the motor 2 is reduced. Consequently, with an increased voltage on the supply circuit, the speed of the motor 2 is increased to produce a greater counter-electromotive force and to maintain the voltage on the lamps substantially constant.

In case the voltage of the supply circuit is reduced, then the strength of the mag netic coil 10 is reduced, so that the spring 14 overcomes the action thereof and thus in creases the air gap 21 and decreases the air gap between the end portions 115 and 16 of the armatures 11 and 12. Thus, the magnetic field through the rotating disk 7 is increased and, consequently, a greater load is placed upon the motor 2 so as to reduce the counterelectromotive force thereof and maintain a constant voltage across the lamps 1.

From the above description, it is apparent that the load produced on the motor 2 by means of the magnetic device 9 varies substantially inversely in accordance with the voltage of the supply circuit. Accordingly, the counter-electromotive force of the motor varies directly in accordance with the supply-circuit voltage to maintain a eonstantpotential across the lamps 1.

Modifications in the system and arrangement and location of parts may be made within the spirit and scope of my invention,

and such modifications are intended to be covered by the appended claims.

I claim as my invention:

1. The combination with a plurality of translating devices and a series-wound motor connected in series across a supply circuit, of a disk generator associated with said motor and means for varying the currentinduced in the disk of said generator to vary the counter-electromotive force of said motor and to maintain aconstant current :llow through the motor and said devices.

2. In a regulator system, a plurality of translating devices and a series-wound mo tor connected in series across a supply cir- 1 cuit, a disk generator directly connected to said motor, and means for varying the load on said generator substantially inversely in accordance with the voltage of the supply circuit.

3. The combination with a plurality of translating devices, and a series motor connccted in series relation with said devices across the supply circuit, of a variable load. directly connected to the motor. including means adapted to vary the counter-electromotive force of the motor directly in accordance with the voltage of the supply circuit.

4L. The combination with a supply circuit, an electric motor, and a plurality of translating devices connected in series with said motor across the supply circuit, of a rot-at able disk directly connected to said motor, and means for establishing a magnetic field through. said disk and for varying the field inversely in accordance with the voltage of the supply circuit.

In testimony whereof, I have hereunto subscribed my name this 22nd day of August 1918.

ANDRFJV H. CANDEE. 

